This has evolved quite a bit over its short life. It's certainly much better than the atrocious first draft :D. My main concern is that (as some people in chat have pointed out) it kind of reads more like a character sheet/tale than a skip. I agree, but I'm a little lost as to how to fix it, so advice on that front is greatly appreciated.

Also, is it interesting? Doomcon has produced much better stuff about immortality than I ever could, but I'm hoping this can at least keep your attention. Thanks to anybody who takes a look, I had a lot of fun writing this and trying to shove it down people's throats.

Okay, here we go. It is late and I am getting tired and this fell to page 4 with no replies, so this is a quick read from me. Standard disclaimers: I don't comment on every detail that needs fixing, I prefer shorter drafts, and if I hit a "downvote point" at any moment when I'm reading, I stop reading. That said, here are my thoughts:

Writing Quality: Couple things here and there. Containment is pretty bare-bones for a Euclid; who has access to this guy for testing or other procedures? Does the guy need to be fed? You've also got some information that seems difficult to support empirically, like "It has been active for at least two millennia and lived in the British Isles for approximately 800 years". This can be fixed by appending "according to SCP-XXXX, it has…" or the like to indicate how that information was obtained, since there's no way to confirm it with clinical observation.

Concept: Not particularly interesting to me, sorry. Reminds me of SCP-1440 (The Old Man from Nowhere), but with a less coherent story and kind of more generic overall. I'm also really skeptical of the exposure therapy approach, since it seems like a huge mistake on the part of the Foundation, especially since the guy's docile and seems to trust the staff to an extent already. Dr. Richardson getting attacked kind of made me think, "well, what were you expecting?" Cognitive Behavioral therapy is a more common approach for PTSD, I think?